Help needed with ATI saphire 290

[kopam]

Hey all, i would really appreciate some help !

Yesterday while i was waiting for the extenders i got x2 on each motherboard. I got them running at 915khs and the total consumption for the PC was 705-710 watt. I keep the window open ( its about 0 to 1 Celsius right now ) and they stay on 72(74 during the day when its hotter ) with fan on 75%.  I did not undervolt yet but will try to do that tomorrow. So my first question , what is the best tool to do that ? I was planing on using Trixx, if this is okay, what Voltage will you suggest ? 
Okay so my second problem is that windows 7 did not recognize the 4-th card. I have all of them connected, all runs well but i see only 3 cards, 4-th is missing. What could the problem be ? Any ideas on fixing that ?

915khs i think is great, they also are on a great temperature so i think if i manage to cut the power consumption with about 50 watt, everything will be just great. Btw what would be the optimal setting for this card in regards of khs/watt.

Appreciate any help !

Cheers all !

[kopam]

any one ?

[jedimindtriks]

Msi afterburner is the best.

i run mine at -44v in the msi afterburner on my 290 cards,(i dont have the 290x)

have you overclocked the cards? what settings are you running? and what is your system specs?

[kopam]

Here is the conf i am using :

]
,
"intensity" : "20",
"vectors" : "1",
"worksize" : "256",
"kernel" : "scrypt",
"lookup-gap" : "2",
"thread-concurrency" : "24550",
"shaders" : "0",
"api-port" : "4028",
"gpu-fan" : "75",
"expiry" : "120",
"gpu-dyninterval" : "7",
"gpu-platform" : "0",
"gpu-threads" : "1",
"gpu-engine" : "1025",
"gpu-memclock" : "1250",
"gpu-powertune" : "10",
"temp-cutoff" : "99",
"temp-overheat" : "95",
"temp-target" : "90",
"log" : "5",
"failover-only" : true,
"queue" : "0",
"scan-time" : "30",
"scrypt" : true,
"kernel" : "scrypt",
"kernel-path" : "/usr/local/bin"
}


With this i am getting 900 with 690 watt for the whole system. If i get powertune to 20 and memclock to 1500 i can get 915 but it gets unstable and more power so its not worth it. I can get even 950 if/960 if i get the engine on 1100 but again, power goes and it gets more unstable.
Still wheni get into afterburder the voltage is locked, at trixx its at 0 and i can only move up to 200 ( so i guess its locked also ? ).
So does that mean that the cards are voltage locked ? If yes do i need to get a new bios for them or i can change the voltage from the conf ?

The bigger problem right now is that i simply can NOT get the 4 cards running on any of the configs i have.
On one of the rigs i have GIGABYTE Z87X and on the other ASUS A85-V, both configs are with Win 7 64, SSD 64gb hard drivers ( cheaper then usual HDD's ) , 4g of ram . On the gygabite rig i am using Intel G3220 on the ASUS AMD A4 400.

So when i have 2 cards its all okay, its mining etc. When i get more then that i either can not even get past the first windows logo or i sometimes get into windows where it starts installing the devices and then i get the blue screen and its out.

Do i have to do anything special to get 4 GPU's running in WIN7 ? Need help !